I have an early 2009 MacBook which also utilizes the GeForce 9400M and it runs circles around my HP which has a GeForce 8500GT in it. Under OSX, it can take anything I throw at it. Under Windows, the only thing I have run is Unreal Tournament 3 which runs better on the MacBook than on my HP. The MacBook can run UT3 at max settings and not really lag. My HP runs it on max and almost dies.